An exciting expedition off the remote western coast of Kangaroo Island in South Australia has captured unique video footage of marine life at depths of more than one hundred metres below sea level.

While data is still being analysed, early documentation has captured the first recordings in the region at this depth of ribbon reefs, which provide critical micro-ecosystems for marine species.

Several fish species were recorded, including the rarely glimpsed knifejaw, swallowtails and spurdog sharks, as well as interesting sponge and delicate soft coral associations.

Marine life spotted above the sea depths included a black-browed albatross, which as a sub-Antarctic species is not commonly seen in South Australia.

A collaboration between the federal and state governments, the six-day voyage was part of state and Commonwealth marine parks monitoring and compliance programs.

Federal Minister for Environment Sussan Ley says the voyage has been a key opportunity to learn more about deeper marine habitats in Australian Marine Parks, and the findings will play a key role in the management of the region’s marine parks.

“The Australian Government is delighted to be working with South Australia’s Department for Environment and Water on this collaborative expedition of discovery,” Minister Ley says.

“This expedition has provided us with a rare opportunity to survey these marine environments which will increase our understanding of the connectivity between the two parks and support their collective management.”

South Australian Minister for Environment and Water David Speirs says the voyage has been a great success, with the team able to document the rich marine life that lived in the deepest parts of these two marine parks off the west coast of Kangaroo Island.

“The trip was the first time in South Australia that high-tech equipment such as the Baited Underwater Remote Video Systems (BRUVS) was deployed at depths of greater than 100 metres,” Minister Speirs says.

“These two marine parks off western Kangaroo Island were of particular interest as they are important areas of deep water upwelling and support a range of marine life.”

Department for Environment and Water (DEW) Marine Science Team Leader Danny Brock says DEW is the state leader in the use of BRUVS, with more than 1000 deployments across South Australia in the past decade as part of the existing South Australian Marine Park Monitoring Program across 19 state-managed marine parks.

“The expedition targeted this important area where an offshore Australian Marine Park national park zone abuts a state marine sanctuary zone in South Australia,” Mr Brock says.

“The zones afford the highest level of protection and are therefore areas of high conservation value.

“The aim of the expedition was to gather baseline biodiversity information on fish assemblages and habitats using BRUVS and we were very successful in our endeavours, although there is still more than 50 hours of footage to undergo analysis.”

Western Kangaroo Island Marine Park is one of 58 Australian Marine Parks managed by Parks Australia that help protect Australia’s offshore marine habitats and species and support the long-term sustainability of marine industries.

The expedition was conducted aboard the Department of Primary Industries and Regions compliance vessel the FPV Southern Ranger.

More information about Australian Marine Parks is available on the Parks Australia website.

Image by Michael Baragwanath from Pixabay